Railway draft-rigging.



1. F. UCONNH.

RAILWAY DRAFT R(GG\NG.

L( ILE I8 l Patented Apr. 221, 1917.-

, [ETI- www uw M WITNESSES:

' l. F. OCONNOR. RAILWAY DRAFT FHGGING. APPLICATION FILED MAR.18.19\5.

Patented Apr.' 24, '1917.

2 SHEETS-SHEET 2 JAV/ ///////////M//////V///// WITNESSES.- M @,La

TTORNE 4 is an enlarged vertical sectional UNITED STATES PATENT OFFICE.v4

JOHN F. O'CONNOR, OF CHICAGO. ILLINOIS.'ASSIGNOR 'I'O WILLIAM H. MINER, OF

CHAZY. NEW YORK.

RAILWAY DRAFT-HIGGING.

Application filed March 18, 1915,

To all whom -it may concern:

Be it known that I, JOHN F. OCosxon, a citizen of the United States, residingr at Chicago in the county of ("ook and btate of Illinois, have invented a certain new and useful Improvement in Railway Draft-Riggings, of which the following is a full. clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in railway draft riggings.

An object of the invention is to provide a high capacity friction gear for railway car draft'riggings and one inwhich the release is always certain.

Another object of the invention is to pro4 vide-a friction gear for railway draft riggings employing wedging or spreading means consisting of a main wedge or spreader and auxiliary wedges or spreaders 'interposed between the main wedge and the friction shoes.

lThe invention furthermore consists in the ii'nprovements in the parts and devices and in the novel combinations of the parts and devices, as herein shown, described or claimed.

In the drawing forming a part of this .specilicatioin Figure 1 is a vertical longif tudinal sectional view of a draft rigging enibodying in v improvements, the yoke leing shown in side elevation. Fig. Q is an enlai red detail sectional view of the frictional ele'llncnts proper showingthe position of the pailts in full release and Fig. 3 is a view sixiiilar to Fig. the 'ricl'ioual elements under full bulf. Fig, vlew taken substantially on the line.l 4 4 of lfi'g. 1 Vand Fig` is a detail, perspective view of one ot' the auxiliary wedges.

ln said drawing, 1() denotes the center sills, 11 the rear stop, l! the front stop, 13 the rear follower, l-lthe front follower, 15 the draw-liar, lt'i the yoke and li' the key connecting the yoke and d raw-barl" All the aforementioned parts are or may be of any well known construction.

Specification of Letters Patent.

2 showing the position of- Patented Apr. 24, 1917.

semi No. 15,345.

The gear proper, as shown,.coiaprises a casting having a friction shell portion 1T() and spring case or chamber 1S. Mounted in thc chamber 1S is a spring which comprises an inner coil 19 and outer coil 20 both of which bear at their rear ends against integral wall portions 21 of the combined fric tion shell and spring casing. Mounted within the friction shell 17 which, as shown most clearly in Fig. el, is substantially rectangular in cross section, are upper and lower friction shoes each of which on its inner face is provided with a pair of inclined antifriction roller seats 23Q3- Located in said roller seats are anti-friction rollers 24--24, the normal position of which is as most clearly shown in Fig. "2. These rollers 24 also roll in suitable inclined roller bearing seats formed on the outer faces of auxiliar \1 wedges 26, each of said auxiliary wedges 2G having its outer end 2.7 inwardly inclined tow: rd the axis of the gear (sec Figs. l and Mounted between the auxiliary wedges 9.6 is a double faced main wedge 2S. the latter at its inner end bea ring against a spring follower 29. lnterposcd between the wedging faces of the main wedge 28 and the inner faces of the auxiliary wedges 24S are. anti-friction rollers 30, each of which is seated in a recess 31 having an inclined bott-om formed on the inner faces of the auxiliary wedges 26. Intel-posed hetween the auxiliary wedges .26 and the front follower ll is a block 32 having its inner 4face inclined as indicated at 33 and which corresponds to the inclined ends 37 of the auxiliary wedges. The shape and size of the block 32 is such that upon-inward movement thereof it will :nove inside of and clear the shoes 22. provided which extends through the bloclc 32, main wedge ".28, spring follower 2.9, springs and rear wall .21 of the friction shell,

said bolt holding the parts in assembled position and the springs under an initial. compression. i

The operation of the device is as follows: Under buff, the front follower l-'L is moved inwardly by the draw-bar and this in turn @L retaining bolt 34 is lower' 14 comes into engagement with the outer ends of the friction shoes 22, it being understood that the latter remain stationary during this initial portion of theaction of the gear. During the operation just described, the auxiliary wedges 26 not only travel longitudinally of the gear but move inwardly, due to the anti-friction rollers 24 rolling up the inclined pockets 23 therefor. Also the auxiliary wedges 2G in traveling inwardly along the inclined facJes 3B lof the block 32 arecaused to move axially of the gear at a faster rate than that of Athe follower. This in turn gives the inain wedge 28 an increased lineal speed. After the fol lower 14 has come into engagement 'with the ends of the friction shoes, the latter are then, of course, forced inwardly with the follower and resistance is created by the spring th-rough the medium of the main and auxiliary wedges, the ultimate movement occurring when the follower 14 engages the end of the friction shell. Upon release, the

friction shoes remain-stationary during the initial portion thereof, while the main and including a main and auxiliary wedges,

wedge, auxiliary wedges and block 3 2 are moved outwardly, thus perfectly releasing the gear, until the spring .follower plate '29 engages the friction shoes. During the remaining portion -of the release action, the

ywedges and friction shoes niove outwardly las a unit. While the preceding description relates more particularly to action under buff, it is apparent that the same sequence of operations takes place under draft, the only differenceA being that it is the friction i Shell which is moved instead. of the froml follower. t pressure is transmitted directly to the fricments is uniformly graduated since it is dependent upon the amount of compression of the spring and'on account of the novel releasing features, the angles of thrust n iay be varied. 1

f Although I- have herein shown and described what I now consider the.pi'cfei-rable form of my invention, yet will be linden lstood that various changes may be inade,

such for instance as in the shape "of the' shell, the number and arrangei'iient of the friction shoes, etc., without departing from the spirit of the' iiivc'ntioiiiiind" all suoli 5 ,changes and n'iodications are lcoi-itemplatedy I @as come within the scope of` the claims appended hereto.

I claim l. A friction gear for draft riggiiigs conipiisiiig a. friclioii shell, yfriction shoes, a

spring, a iiiaiii edge :ii-ting dircctly]against said spring, auxiliary wedges between the It will lie-noted that a spring rollers between each shoe and its corresponding auxiliary Wedge, said slices remaining stationary during initial portions of the actuation of the gear.

3. A friction gear for draft riggings coinprising a friction shell, friction shoes cooperable therewith, a spring, wedging means interposed between said spring andY Ashoes and including a main andauxiliary wedges, and anti-friction rollers between thevmain and auxiliary wedges andalso between the auxiliary wedges .andthe friction slices.

et.l A friction gear 'for draft riggings coniprising va friction shell, frictionl shoes cooperable therewith, a spring, wedging means interposed v'between said spring and shoes and anti-friction rollers between the main and auxiliary -wedges and also between the auxiliary wedges and the friction shoes,

"' there being aplurality of anti-friction rollers between each auxiliary wedgeand adjacent'friction shoe.

5. A'. friction gear for'draft riggings coinprising a'friction'sliell, friction shoesfcooperable therewith, a spring, a main wedge, auxiliary wedges interposed between Athe main 'wedge and the friction shoes, and anti-friction rollers interposed between the friction shoes and auxiliary wedges', said 'friction shoes and auxiliarywedges having roller bearing faces inclined inwardly to* ward the center 'of the gear to thereby cause the auxiliary wedges to move inwardly tov ward t'li'e'iax'is of the gea-r during initial portions of buff'and draft-actions, said shoes remaining stationaryv during said initial portions of buff or draft 'actions v operable therewith and havin 6. A friction gear for draft riggings coinpi'ising a friction sliell, friction shoes, a

spring', a main wedge, auxiliary wedges, a

i"plurality o'f anti-friction rollers V'between each slioe and corresponding auxiliary wedge, a follower, and a block interposed `between the follower and the auxiliary wedges, the latter and'said block havinginclined engaging faces.

7. A friction gear for draft ri-ggings comprising a friction shell, friction shoes cotheir outer ends extended beyond the en of the .fric tion shell, a. spring, wedgingv means interposed between said sprin and shoes andincluding a main wedge an 'auxiliary wedges,

las

e, plurality of anti-frie'tioii rollers between the fxietiou shoes and auxlllaiy Wedges and between the auxiliary, wedges and the main wedge, a follower normally spaced from the outer: Gends of said friction shoes, and means for transmitting pressure from said follower to the auxllary Wedges independently of the frction shoes during; 'initial uetions of the geen JOHN I". ()`(I()NN()lL Witnesses:

CARRIE G. RANI., GEORGIE VICm-zm'. 

